This is a mod for Nuclear Throne a game by Vlambeer. The mod has more ultra mutations then the released game and a lot of new weapons, a new character and area. You can download it here: https://erdeppol.itch.io/nuclear-throne-ultra-mod
Here is a changelist for update 1 & original version: https://www.reddit.com/r/ntmods/comments/46rud5/nuclear_throne_ultra_mod_update_1/
You need Nuclear throne for the mod to work. I will update it as often as possible. If you have any ideas for a character, weapon, mutation whatever make sure to leave a comment!